1	SUI	(3-amino-2,5-dioxo-1-pyrrolidinyl)acetic acid	1.000
2	SIC	(2r)-2-[(3s)-3-amino-2,5-dioxopyrrolidin-1-yl]-3-sulfanylpropanoic acid	0.857
3	V7J	2-(2,5-dioxopyrrolidin-1-yl)acetamide	0.769
4	NEN	1-ethyl-pyrrolidine-2,5-dione	0.750
5	NEQ	N-ethylmaleimide	0.750